DeepSeek V3.1 Terminus API Pricing
DeepSeek · Budget · Apache 2.0 · released 2025-09. Prices in USD per 1 million tokens. Data snapshot: 2026-09-28.
The price we publish for DeepSeek V3.1 Terminus has changed once since 2026-08-15, most recently by +4.7% on 2026-08-19; it is now the 95th cheapest of 142 Budget models. Buying from AtlasCloud rather than at the rate quoted here lowers the token price by about 3%, for a quantized fp8 build. No Arena score is published for it, so it carries no Efficiency score and cannot hold the FinOps Friendly badge.
- Input: $0.27 per 1M tokens
- Output: $1.00 per 1M tokens
- Batch API (input/output): not published
- Prompt-cache read: $0.14
- Context window: 164K
DeepSeek V3.1 Terminus market position
On blended price ($0.781 per 1M tokens at 30% input, 70% output) it is cheaper than 33% of Budget models: 95th cheapest of 142. Across every category it is cheaper than 66% of priced text models in the catalogue: 95th cheapest of 281.
DeepSeek V3.1 Terminus licence, size and capabilities
DeepSeek V3.1 Terminus is open source: its weights are published under Apache 2.0, an OSI-approved licence with no field-of-use limit, so it can be self-hosted as well as bought by the token. Its parameter count is not published. Listed capabilities: Text, Reasoning, Code, Agents. Filling its 164K context window once costs $0.04 in input tokens at list price.
Monthly cost at 100K requests, by business use case
From the after-discounts figure (prompt caching on the cached input share, batch API for async workloads, only where the provider publishes those rates), which assumes you implement both, to the list price. One figure means no discount is published.
| Use case | Tokens (in/out) | Monthly (after discounts – list) |
|---|---|---|
| Support Ticket | 1,500 / 500 | $78 – $91 |
| Knowledge Q&A | 2,000 / 800 | $115 – $134 |
| Meeting Summary | 10,000 / 1,200 | $377 – $390 |
| Marketing Content | 2,500 / 1,800 | $241 – $247 |
| Coding Task | 3,000 / 2,000 | $261 – $281 |
| Invoice Processing | 1,500 / 600 | $94 – $101 |
| Call Summary | 2,000 / 700 | $121 – $124 |
| Agent Workflow | 6,000 / 3,000 | $405 – $462 |
DeepSeek V3.1 Terminus pricing by host
A host is a company that runs the model and sells it by the token — the lab that made it, a cloud platform like Amazon Bedrock, Azure or Vertex, or an independent provider. One model, several sellers, and often several prices. This model is sold by 4 different hosts. The price quoted above is the one we publish so that models stay comparable; it is not necessarily the cheapest way to buy this model. List prices as published on 2026-09-28 via OpenRouter — negotiated rates, committed-use discounts and provisioned capacity are not shown.
Cheapest host: AtlasCloud at $0.30 input / $0.95 output per 1M tokens, 3% below the price we publish on a blended basis (30% input, 70% output). It serves a quantized fp8 build, which is not the same product as the full-precision model. All of them charge within 10% of one another.
| Host | Input $/1M | Output $/1M |
|---|---|---|
| AtlasCloud — fp8 | $0.30 | $0.95 |
| SiliconFlow (the price shown above) — fp8 | $0.27 | $1.00 |
| Novita (the price shown above) — fp8 | $0.27 | $1.00 |
| StreamLake | $0.34 | $1.03 |
DeepSeek V3.1 Terminus price history
DeepSeek V3.1 Terminus has been in our daily price archive since tracking began on 2026-08-15, when it listed at $0.27 input / $0.95 output per 1M tokens. The price we publish has changed once since then. The latest change, on 2026-08-19, was +4.7% on the blended price (30% input, 70% output), to $0.27 input / $1.00 output.
| Date | Old price (in / out) | New price (in / out) | Blended change |
|---|---|---|---|
| 2026-08-19 | $0.27 / $0.95 | $0.27 / $1.00 | +4.7% |
Alternatives to DeepSeek V3.1 Terminus
- Next cheaper Budget model: Qwen3.6 35B A3B (Alibaba) at $0.745 blended, 5% less.
- Next more expensive: Qwen3 Coder 480B A35B (Alibaba) at $0.790 blended, 1% more.
Common questions about DeepSeek V3.1 Terminus pricing
- How much does DeepSeek V3.1 Terminus cost?
- DeepSeek V3.1 Terminus costs $0.27 per million input tokens and $1.00 per million output tokens on the API.
- Does DeepSeek V3.1 Terminus offer batch or cached pricing?
- Prompt-cache reads cost $0.14/M input tokens. No batch pricing is published.
- What would DeepSeek V3.1 Terminus cost per month?
- For a support-ticket workload (1,500 input + 500 output tokens per request) at 100K requests/month, DeepSeek V3.1 Terminus costs about $91 at list prices.
- Has the price of DeepSeek V3.1 Terminus changed?
- DeepSeek V3.1 Terminus has been in our daily price archive since tracking began on 2026-08-15, when it listed at $0.27 input / $0.95 output per 1M tokens. The price we publish has changed once since then. The latest change, on 2026-08-19, was +4.7% on the blended price (30% input, 70% output), to $0.27 input / $1.00 output.
These are list prices: real cost also depends on caching, batching, negotiated discounts, marketplace agreements, and existing contracts. Get a FinOps review from OptimNow or compare all models.
Build the business case for DeepSeek V3.1 Terminus in the AI ROI Calculator: add your business value on top of these costs to get ROI, break-even and payback.
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